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Characteristics of Bis [2‐Ethylhexyl] Orthophosphoric Acid Chromatographic Columns for Rare‐Earth Separation
Author(s) -
Cheng HwaSheng,
Ke ChiungHuei,
Lin ChingYü,
Winchester John W.
Publication year - 1963
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.196300010
Subject(s) - chemistry , chromatography , elution , solvent , extraction (chemistry) , reproducibility , chromatographic separation , solvent extraction , rare earth , volume (thermodynamics) , high performance liquid chromatography , organic chemistry , mineralogy , physics , quantum mechanics
Separation factors for La, Ce, and Pr have been measured precisely on columns of bis [ 2 ‐ethylhexyl] orthophosphoric acid (DEP) supported on diatomaceous silica made hydrophobic with dimethyldichlorosilane. Column behavior is related to the properties of DEP when used as a solvent extractant, and the column method is a useful one for studying a solvent extraction system with great precision and reproducibility. Separation factors measured are Ce/La = 2.8 ± 0.1 and Pr/Ce = 2.7 ± 0.1. The dependence of elution volume on HCl activity is found to be approximately 2.5 power in the range 0.2–0.3 M HCl.